A low-THD class-D audio amplifier with dual-level dual-phase carrier pulsewidth modulation

Shang Hsien Yang; Yuan Han Yang; Ke-Horng Chen; Ying Hsi Lin; Tsung Yen Tsai; Shian Ru Lin; Chao Cheng Lee

doi:10.1109/TIE.2015.2448518

A low-THD class-D audio amplifier with dual-level dual-phase carrier pulsewidth modulation

Shang Hsien Yang^*, Yuan Han Yang, Ke-Horng Chen, Ying Hsi Lin, Tsung Yen Tsai, Shian Ru Lin, Chao Cheng Lee

^*Corresponding author for this work

電機工程學系

研究成果: Article › 同行評審

12 引文斯高帕斯（Scopus）

摘要

In this paper, a class-D audio amplifier which combines the advantages of the phase-shifted carrier pulsewidth modulation (PWM) and the multiple-level carrier PWM is proposed with a dual-level dual-phase carrier (DLDPC) PWM. The proposed closed-loop amplifier includes a second-order integrator and a DLDPC triangular wave generator. Two sets of 180° out-of-phase triangular waves are used as carriers, and each set has its respective offset voltage level with nonoverlapping amplitude. By performing the double Fourier analysis, it can be found that the linearity can be enhanced and the distortion can be reduced with the proposed modulation. Experimental results show that the proposed fully differential DLDPC PWM class-D audio amplifier features a total harmonic distortion lower than 0.01% with an output voltage swing of ±5V.

原文	English
文章編號	7130610
頁（從 - 到）	7181-7190
頁數	10
期刊	IEEE Transactions on Industrial Electronics
卷	62
發行號	11
DOIs	https://doi.org/10.1109/TIE.2015.2448518
出版狀態	Published - 1 十一月 2015

存取文件

10.1109/TIE.2015.2448518

Link to publication in Scopus

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引用此

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title = "A low-THD class-D audio amplifier with dual-level dual-phase carrier pulsewidth modulation",

abstract = "In this paper, a class-D audio amplifier which combines the advantages of the phase-shifted carrier pulsewidth modulation (PWM) and the multiple-level carrier PWM is proposed with a dual-level dual-phase carrier (DLDPC) PWM. The proposed closed-loop amplifier includes a second-order integrator and a DLDPC triangular wave generator. Two sets of 180° out-of-phase triangular waves are used as carriers, and each set has its respective offset voltage level with nonoverlapping amplitude. By performing the double Fourier analysis, it can be found that the linearity can be enhanced and the distortion can be reduced with the proposed modulation. Experimental results show that the proposed fully differential DLDPC PWM class-D audio amplifier features a total harmonic distortion lower than 0.01% with an output voltage swing of ±5V.",

keywords = "Class-D, DLDPC, IMD, MLCPWM, PSCPWM, PWM, THD, dual-level dual-phase carrier",

author = "Yang, {Shang Hsien} and Yang, {Yuan Han} and Ke-Horng Chen and Lin, {Ying Hsi} and Tsai, {Tsung Yen} and Lin, {Shian Ru} and Lee, {Chao Cheng}",

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AU - Yang, Shang Hsien

AU - Yang, Yuan Han

AU - Chen, Ke-Horng

AU - Lin, Ying Hsi

AU - Tsai, Tsung Yen

AU - Lin, Shian Ru

AU - Lee, Chao Cheng

PY - 2015/11/1

Y1 - 2015/11/1

N2 - In this paper, a class-D audio amplifier which combines the advantages of the phase-shifted carrier pulsewidth modulation (PWM) and the multiple-level carrier PWM is proposed with a dual-level dual-phase carrier (DLDPC) PWM. The proposed closed-loop amplifier includes a second-order integrator and a DLDPC triangular wave generator. Two sets of 180° out-of-phase triangular waves are used as carriers, and each set has its respective offset voltage level with nonoverlapping amplitude. By performing the double Fourier analysis, it can be found that the linearity can be enhanced and the distortion can be reduced with the proposed modulation. Experimental results show that the proposed fully differential DLDPC PWM class-D audio amplifier features a total harmonic distortion lower than 0.01% with an output voltage swing of ±5V.

AB - In this paper, a class-D audio amplifier which combines the advantages of the phase-shifted carrier pulsewidth modulation (PWM) and the multiple-level carrier PWM is proposed with a dual-level dual-phase carrier (DLDPC) PWM. The proposed closed-loop amplifier includes a second-order integrator and a DLDPC triangular wave generator. Two sets of 180° out-of-phase triangular waves are used as carriers, and each set has its respective offset voltage level with nonoverlapping amplitude. By performing the double Fourier analysis, it can be found that the linearity can be enhanced and the distortion can be reduced with the proposed modulation. Experimental results show that the proposed fully differential DLDPC PWM class-D audio amplifier features a total harmonic distortion lower than 0.01% with an output voltage swing of ±5V.

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